乙酸酐 、
Dimethyl-carbamic acid (1R,6S,7S,8S,9R,10R)-9-hydroxy-10-isopropenyl-4,4,7-trimethyl-3,5,12-trioxa-tricyclo[5.3.2.01,6]dodec-8-yl ester 在
4-二甲氨基吡啶 作用下,
以
二氯甲烷 为溶剂,
以94%的产率得到Acetic acid (1R,6S,7S,8S,9R,10R)-8-dimethylcarbamoyloxy-10-isopropenyl-4,4,7-trimethyl-3,5,12-trioxa-tricyclo[5.3.2.0
1,6]dodec-9-yl ester